STMCube UART与ADC配置

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STMCU小助手发布时间：2022-12-24 17:41

文章
文章封面:
文章简介:	STMCube UART与ADC配置

要做的事
通过STM32自带的12位ADC模块读取8通道电压信号，并将其通过USART1发送出来

STM32Cube的USART1配置
USART1总体配置
USART1的配置如下图所示
波特率初始化为115200，后续可以再进行修改

USART1引脚配置
USART1的引脚配置如下

PA10为USART1的RX

PB6为USART1的TX

fputc重定向
重定向完成后，在.c文件的开头或对应的.h文件中include <stdio.h>即可使用printf函数

USART1接收

重写中断服务函数HAL_UART_RxCpltCallback

自定义一个Clear函数

我们需要在几个地方extern一下，一个是usart.h一个是main.c

这里附上相关代码

首先是usart.h

/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file usart.h
* @brief This file contains all the function prototypes for
* the usart.c file
******************************************************************************
* @attention
*
* Copyright (c) 2022 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __USART_H__
#define __USART_H__
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* USER CODE BEGIN Includes */
#define USART_REC_LEN 200 //定义最大接收字节数 200
extern uint8_t USART_RECEIVE_CHAR;
extern uint8_t USART_RECEIVECOMPLETED;
extern uint8_t USART_COUNT;
extern uint8_t USART_RX_BUF[USART_REC_LEN];
/* USER CODE END Includes */
extern UART_HandleTypeDef huart1;
/* USER CODE BEGIN Private defines */
/* USER CODE END Private defines */
void MX_USART1_UART_Init(void);
/* USER CODE BEGIN Prototypes */
void ClearUSARTReceiveBuffer(void);
/* USER CODE END Prototypes */
#ifdef __cplusplus
}
#endif
#endif /* __USART_H__ */

复制代码

usart.c

/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file usart.c
* @brief This file provides code for the configuration
* of the USART instances.
******************************************************************************
* @attention
*
* Copyright (c) 2022 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "usart.h"
/* USER CODE BEGIN 0 */
#include "stdio.h"
#include <string.h>
uint8_t USART_RECEIVE_CHAR = 0;
uint8_t USART_RECEIVECOMPLETED = 0;// 1 Completed 0 Incompleted
uint8_t USART_COUNT = 0; // 接收的字符数
uint8_t USART_RX_BUF[USART_REC_LEN] = {0};
/* USER CODE END 0 */
UART_HandleTypeDef huart1;
/* USART1 init function */
void MX_USART1_UART_Init(void)
{
/* USER CODE BEGIN USART1_Init 0 */
/* USER CODE END USART1_Init 0 */
/* USER CODE BEGIN USART1_Init 1 */
/* USER CODE END USART1_Init 1 */
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART1_Init 2 */
/* USER CODE END USART1_Init 2 */
}
void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
if(uartHandle->Instance==USART1)
{
/* USER CODE BEGIN USART1_MspInit 0 */
/* USER CODE END USART1_MspInit 0 */
/** Initializes the peripherals clock
*/
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
/* USART1 clock enable */
__HAL_RCC_USART1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/**USART1 GPIO Configuration
PA10 ------> USART1_RX
PB6 ------> USART1_TX
*/
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* USART1 interrupt Init */
HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART1_IRQn);
/* USER CODE BEGIN USART1_MspInit 1 */
/* USER CODE END USART1_MspInit 1 */
}
}
void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{
if(uartHandle->Instance==USART1)
{
/* USER CODE BEGIN USART1_MspDeInit 0 */
/* USER CODE END USART1_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_USART1_CLK_DISABLE();
/**USART1 GPIO Configuration
PA10 ------> USART1_RX
PB6 ------> USART1_TX
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_10);
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6);
/* USART1 interrupt Deinit */
HAL_NVIC_DisableIRQ(USART1_IRQn);
/* USER CODE BEGIN USART1_MspDeInit 1 */
/* USER CODE END USART1_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */
// 重定向函数1
// 注意这里重定向函数的写法
int fputc(int ch,FILE *f)
{
// 另一种重定向函数写法
// uint8_t temp[1]={ch};
// HAL_UART_Transmit(&huart1,(uint8_t*)&ch,1,0xFFFF); //UartHandle是串口的句柄
// return ch;
// 可行的重定向函数写法
while(!(USART1->ISR & (1<<7)));
USART1->TDR = ch;
return ch;
}
// 重写串口中断服务函数
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart){
// 每当串口接收一个字符就进入这个HAL_UART_RxCpltCallback函数
if(USART_COUNT >= 200){
// 判断接收的字符串长度是否超过了最大缓冲区长度
printf("Overflow");// 若超出最大长度则输出Overflow
memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF));
USART_COUNT = 0;
}else{
USART_RX_BUF[USART_COUNT] = USART_RECEIVE_CHAR;// 将接收到的依次字符存放到USART_RX_BUF
USART_COUNT++;// Buffer中的指针后移
if((USART_RX_BUF[USART_COUNT-1]=='\n') && (USART_RX_BUF[USART_COUNT-2]=='\r')){// 判断是否读到了\r\n
// 若已经读到了\r\n则Buffer中的数据即用户发送的数据且以\r\n结尾
// printf("Received Completed");
USART_RECEIVECOMPLETED = 1;
// HAL_UART_Transmit(huart,USART_RX_BUF,sizeof(USART_RX_BUF),100); // 将Buffer中的内容传回给用户
// memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF)); // 清空Buffer用于存放下一个用户发送的字符串
// memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF));
// USART_COUNT = 0;// Buffer中的指针复位
// USART_COUNT = 0;
}
}
HAL_UART_Receive_IT(&huart1,&USART_RECEIVE_CHAR,1);// 再次打开串口中断否则串口只能接收一个char字符
}
void ClearUSARTReceiveBuffer(void){
USART_COUNT = 0;// Buffer中的指针复位
USART_RECEIVECOMPLETED = 0; // 清除接收完成标志
memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF)); // 清空Buffer用于存放下一个用户发送的字符串
}
/* USER CODE END 1 */

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main.c

/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
* @author : Lihang Zhu
******************************************************************************
* @attention
*
* Copyright (c) 2022 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "adc.h"
#include "dac.h"
#include "dma.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"
#include <stdio.h>
#include "cv.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/*PB6---UART1_TX
PA10---UART1_RX
PA0---ADC1_IN5
PA1---ADC1_IN6
PA2---ADC1_IN7
PA3---ADC1_IN8
PA6---ADC1_IN11
PA7---ADC1_IN12
PB0---ADC1_IN15
PB0---ADC1_IN16
PA4---DAC1_OUT1 程序输出 2048/4096*3.3= 1.65
PA5---DAC1_OUT2
PA15 LED灯进行翻转亮灭
*/
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
// ADC Buffer 16bit
volatile uint16_t ADC_Value[8];//存储数组
float ADC_RESULT = 0;
// USART Related Content
// @author : Lihang Zhu
extern uint8_t USART_RECEIVE_CHAR;
extern uint8_t USART_RECEIVECOMPLETED;
extern uint8_t USART_COUNT;
extern uint8_t USART_RX_BUF[USART_REC_LEN];
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_ADC1_Init();
MX_TIM6_Init();
MX_USART1_UART_Init();
MX_DAC1_Init();
/* USER CODE BEGIN 2 */
HAL_TIM_Base_Start_IT(&htim6);
HAL_GPIO_WritePin(LED_Flsh_GPIO_Port, LED_Flsh_Pin, GPIO_PIN_RESET);
HAL_ADCEx_Calibration_Start(&hadc1,ADC_SINGLE_ENDED); //AD校准
HAL_ADC_Start_DMA(&hadc1,(uint32_t*)&ADC_Value,8);// 强制转换为uint32_t
Dac1_Set_Vol(1200); // PA4
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
HAL_UART_Receive_IT(&huart1,&USART_RECEIVE_CHAR,1); //开启第一次中断
while (1)
{
/* USER CODE END WHILE */
// ADC_RESULT = 3300000.0/4096.0*ADC_Value[0]/1000.0; printf("%f \r\n",ADC_RESULT);
// HAL_Delay(300);
/* USER CODE BEGIN 3 */
// printf("Hello");
// int i = 200;
// if(i>=0){
// CV_setting1();
// i--;
// }
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
{
Error_Handler();
}
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSICalibrationValue = 0;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
RCC_OscInitStruct.PLL.PLLM = 1;
RCC_OscInitStruct.PLL.PLLN = 40;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

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使用USART中断接收数据，记得要在while前开启USART中断

此外，这里也要再次开启中断

注意：每当串口接收一个字符就进入这个HAL_UART_RxCpltCallback函数，我们将将接收到的依次字符按照收到的顺序从低到高存放到USART_RX_BUF中

我们可以通过USART_RECEIVECOMPLETED判断USART1是否读取到了完整的数据

读取到的数据存放在USART_RX_BUF中

STM32Cube的时钟配置
配置时钟信号为80 MHz

注意：时钟频率过低会影响printf等函数的功能